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Sonic reluctantly takes Tails with him to the Big City to find some cotter pins for the Freedom Fighters catapults. While in the City, Sonic is nearly eaten alive by his old dog Muttski, now a roboti-sized guard dog in the Junk Heaps. Later, while escaping some Swat-Bots, Sonic and Tails overhear Robotnik explaining his plan to defoliate the Great Forest with a chemical spray and reveal Knothole.
